Surgical cannula for intrahepatic portal shunt through jugular vein and surgical system comprising surgical cannula

Abstract

The utility model discloses a surgical cannula for transjugular vein intrahepatic portal shunt and a surgical system comprising the surgical cannula. The surgical cannula comprises an outer tube and an inner tube which are sleeved with each other, and the insertion end of the surgical cannula is used for forming a channel for a surgical instrument to enter; the end, located at the insertion end of the operation cannula, of the outer tube is arranged to be capable of being bent in the set direction. The inner tube comprises an inner tube main body and a bend adjusting tube which are communicated with each other, and the bend adjusting tube is connected to the end part of the inner tube main body and is arranged corresponding to the insertion end of the surgical cannula; the bend adjusting pipe comprises ribs and a bendable part which are arranged side by side, the ends, away from the inner pipe body, of the ribs and the bendable part are connected, and the ends, close to the inner pipe body, of the ribs are connected with the inner pipe body. The end, close to the inner pipe body, of the bendable part is connected with the outer pipe, the outer pipe moves in the axis direction of the inner pipe so that the ribs can be driven to move relative to the bendable part, and the bendable part can be bent. By adopting the operation cannula provided by the utility model, the overall bending adjustment of the operation cannula can be realized.

Description

Technical Field

[0001] This application relates to the field of interventional surgical instruments, and more particularly to a surgical cannula for transjugular intrahepatic portosystemic shunt and a surgical system comprising the cannula. Background Technology

[0002] Currently, the curvature of the tip of the transhepatic intrahepatic puncture rod used in clinical practice is fixed. Because the relative positions of the hepatic vein / inferior vena cava and portal vein vary among patients, the tip of the puncture rod needs to be shaped during jugular vein intrahepatic puncture. Each time the puncture rod is shaped, it needs to be withdrawn from the body, making the procedure cumbersome, compromising puncture accuracy, affecting puncture results, and increasing puncture risks. An excessively large angle of the puncture rod can cause patient discomfort and even pose certain risks.

[0003] The above method has the following shortcomings: 1. It requires preoperative estimation of the possible angle adjustment range during the puncture process based on experience or medical imaging images, which is not accurate enough; 2. This method cannot flexibly adjust the bending angle of the tip of the puncture kit according to the actual situation encountered during the actual operation; 3. If it is found during the operation that the bending angle of the tip of the pre-bent metal guide tube is insufficient or too large, making it impossible to perform the puncture smoothly, then the entire puncture kit must be removed and readjusted, causing secondary injury to the patient, wasting the doctor's energy, and prolonging the operation time. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a surgical cannula for transjugular intrahepatic portosystemic shunt and a surgical system containing the cannula, thereby resolving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides a technical solution for transjugular intrahepatic portosystemic shunt surgery, the surgical cannula comprising:

[0006] The outer tube and inner tube are nested together, and the insertion end of the surgical cannula is used to insert into the tissue to form a channel for surgical instruments to enter.

[0007] The outer tube at one end of the insertion end of the surgical cannula is configured to bend in a predetermined direction;

[0008] The inner tube includes a connected inner tube body and an adjusting tube, wherein the adjusting tube is connected to the end of the inner tube body and is provided corresponding to the insertion end of the surgical cannula;

[0009] The bending tube includes ribs and a bendable component arranged side by side. The ribs are connected to the end of the bendable component away from the inner tube body, and the end of the ribs close to the inner tube body is connected to the inner tube body.

[0010] The flexible member is connected to the outer tube at one end near the inner tube body. By moving the outer tube along the axial direction of the inner tube, the rib moves relative to the flexible member, thereby causing the flexible member to bend.

[0011] Optionally, the bendable member includes a first connecting strip and two rows of comb teeth located on opposite sides of the first connecting strip. Each row of comb teeth includes multiple comb teeth, one end of each comb tooth is connected to the first connecting strip, and the other end is disposed towards the rib.

[0012] Optionally, the two rows of comb teeth are symmetrically arranged about the first connecting strip as the axis of symmetry.

[0013] Optionally, the outer tube at one end of the insertion end of the surgical cannula includes a plurality of movable members, the first sides of the plurality of movable members being connected in sequence; and the second sides of the plurality of movable members being configured to be movable.

[0014] Optionally, each of the second sides of the plurality of movable members is configured to be movable, and the second side of each movable member is configured to press against the next movable member.

[0015] Optionally, the outer wall of the second side of each of the movable parts is provided with a protrusion and a groove, the protrusion and the groove are provided at opposite ends of the outer wall of the second side, the protrusion is provided toward the next movable part and is partially inserted into the groove of the next movable part;

[0016] In the initial state, the protrusion of the movable member is spaced apart from the inner wall of the groove of the corresponding next movable member.

[0017] Optionally, both the outer tube and the inner tube are provided with an alignment part at one end located at the insertion end of the surgical cannula, so as to realize the installation and positioning of the outer tube and the inner tube;

[0018] The ribs and the flexible components are integrally formed.

[0019] Optionally, the surgical cannula further includes a handle, the handle comprising a handle base and a rotating component;

[0020] On the side away from the insertion end, one of the outer tube and the inner tube is fixedly connected to the handle base, and the other of the outer tube and the inner tube is screwed to the rotating member. By rotating the rotating member, one of the outer tube and the inner tube can be driven to move axially relative to the other.

[0021] Optionally, the surgical cannula may further include a fixing element and a lead screw;

[0022] The outer tube is connected to the fixing member, and the fixing member is embedded in the handle base;

[0023] The inner tube is connected to the lead screw, and the lead screw is screwed to the rotating component.

[0024] To achieve the above objectives, the present invention provides a surgical system comprising a guide cannula, a puncture needle, and a surgical cannula as described above.

[0025] The guide sleeve is disposed in the inner tube and is sleeved on the puncture needle.

[0026] This application provides a surgical cannula for transjugular intrahepatic portosystemic shunt and a surgical system comprising the cannula. The surgical cannula provided in this application, by employing ribs and flexible components in conjunction with the outer tube, enables overall bending of the surgical cannula; furthermore, the ribs and flexible components can be formed by cutting the ends of the inner tube, thereby improving the overall strength of the surgical cannula during bending. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of a surgical cannula provided in this application;

[0028] Figure 2 yes Figure 1 The diagram shows the structure of the inner tube in the surgical cannula.

[0029] Figure 3 yes Figure 2 Right view of the inner tube shown;

[0030] Figure 4 yes Figure 2 A schematic diagram of the inner tube in a bent state;

[0031] Figure 5 yes Figure 1 The diagram shows the structure of the outer tube in the surgical cannula.

[0032] Figure 6 yes Figure 5 Right view of the outer tube shown;

[0033] Figure 7 yes Figure 5 A schematic diagram of the outer tube in a bent state;

[0034] Figure 8 yes Figure 1 A magnified view of the surgical cannula in region II;

[0035] Figure 9 This is a schematic diagram of an embodiment of a surgical system provided in this application. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] Please see Figures 1-4 , Figure 1 This is a schematic diagram of the structure of an embodiment of a surgical cannula provided in this application; Figure 2 yes Figure 1 The diagram shows the structure of the inner tube in the surgical cannula. Figure 3 yes Figure 2 Right view of the inner tube shown; Figure 4 yes Figure 2 The diagram shows the inner tube in a bent state.

[0043] The surgical cannula 10 includes an outer tube 110 and an inner tube 120 that are nested together. The insertion end 101 of the surgical cannula 10 is used to insert into the tissue to form a channel for surgical instruments to enter. The end of the outer tube 110 located at the insertion end 101 of the surgical cannula 10 is configured to bend in a predetermined direction. The inner tube 120 includes a connected inner tube body 121 and a bending tube 122. The bending tube 122 is connected to the end of the inner tube body 121 and is provided corresponding to the insertion end 101 of the surgical cannula 10. The bending tube 122 includes ribs 123 and a bendable member 124 arranged side by side. The end of the ribs 123 and the bendable member 124 that is originally away from the inner tube body 121 is connected to the end of the ribs 123 that is close to the inner tube body 121.

[0044] One end of the bendable member 124 near the inner tube body 121 is connected to the outer tube 110. By causing the outer tube 110 to move axially relative to the inner tube 120, the rib 123 moves relative to the bendable member 124, thereby causing the bendable member 124 to bend.

[0045] Therefore, in this embodiment, by using ribs 123 and flexible members 124 in conjunction with the outer tube 110, the overall bending of the surgical cannula 10 can be achieved. In addition, ribs 123 and flexible members 124 can be formed by cutting the end of the inner tube, thereby improving the strength of the entire surgical cannula 10 during bending.

[0046] The bendable member 124 includes a first connecting strip 1241 and two rows of comb teeth 1242 located on opposite sides of the first connecting strip 1241. Each row of comb teeth 1242 includes multiple comb teeth 1243. One end of each comb tooth is connected to the first connecting strip 1241, and the other end is set towards the rib 123.

[0047] The ribs 123 and the flexible members 124 can be formed by laser cutting the ends of the inner tube body 121.

[0048] Furthermore, in this embodiment, the two rows of comb teeth 1242 can be symmetrically arranged with the first connecting strip 1241 as the axis of symmetry, and the two rows of comb teeth 1242 forming a placement space for the first connecting strip 1241 at one end facing the first connecting strip 1241, and the rib 123, the two rows of comb teeth 1242 and the first connecting strip 1241 can be arranged to form a cavity that communicates with the inner tube body 121.

[0049] In this embodiment, the flexible member 124 can be bent by making the outer tube 110 move axially relative to the inner tube 120, and the bending direction of the flexible member 124 can be adjusted by making the outer tube 110 move in different directions.

[0050] Please see Figures 5-7 , Figure 5 yes Figure 1 The diagram shows the structure of the outer tube in the surgical cannula. Figure 6 yes Figure 5 Right view of the outer tube shown; Figure 7 yes Figure 5 The diagram shows the outer tube in a bent state.

[0051] The outer tube 110, located at the insertion end of the surgical cannula 10, includes multiple movable parts 111, with each first side A of the multiple movable parts 111 connected in sequence; each second side B of the multiple movable parts 111 is configured to be movable.

[0052] In this configuration, each of the second sides B of the plurality of movable members 111 is configured to be movable, and the second side B of each movable member 111 is configured to press against the next movable member 111.

[0053] Specifically, multiple movable parts 111 are arranged sequentially along the axial direction of the outer tube 110. The outer wall of the second side B of each movable part 111 is provided with a protrusion 1111 and a groove 1112. The protrusion 1111 and the groove 1112 are located at opposite ends of the outer wall of the second side B. The protrusion 1111 is positioned towards the next movable part 111 and is partially inserted into the groove 1112 of the next movable part 111. In the initial state, the protrusion 1111 of the movable part 111 is spaced apart from the inner wall of the groove 1112 of the corresponding next movable part 111.

[0054] In this embodiment, the adaptive bending of the outer tube 110 can be achieved by adjusting the distance between the protrusion 1111 of the movable member 111 and the next movable member 111.

[0055] In the initial state, both the outer tube 110 and the inner tube 120 are straight tubes.

[0056] The outer tube 110 and the inner tube 120 are both provided with an alignment part 102 at one end of the insertion end of the surgical cannula 10 to realize the installation and positioning of the outer tube and the inner tube.

[0057] The alignment part 102 can be an alignment hole. By connecting the alignment holes of the outer tube 110 and the inner tube 120, the installation and positioning of the outer tube 110 and the inner tube 120 can be achieved.

[0058] Please refer to further information. Figure 1 and Figure 8 . Figure 8 yes Figure 1 The surgical cannula shown is a magnified view of a portion of region II.

[0059] In this embodiment, the surgical cannula 10 also includes a handle 130, which includes a handle base 131 and a rotating component 132.

[0060] On the side away from the insertion end 101, one of the outer tube 110 and the inner tube 120 is fixedly connected to the handle base 131, and the other of the outer tube 110 and the inner tube 120 is screwed to the rotating member 132. By rotating the rotating member 132, one of the outer tube 110 and the inner tube 120 can be driven to move axially relative to the other.

[0061] The surgical cannula 10 also includes a fixing member 133 and a screw rod 134; the outer tube 110 is connected to the fixing member 133, and the fixing member 133 is embedded in the handle base 131, thereby ensuring the stability of the outer tube 110; the inner tube 120 is connected to the screw rod 134, and the screw rod 134 is screwed to the rotating member 132.

[0062] Therefore, by rotating the rotating component 132 relative to the handle base 131, the inner tube 120 can be driven to move axially relative to the outer tube 110. This allows the flexible component 124 to be bent under the pull of the rib 123, thereby achieving the bending of the entire surgical cannula 10 insertion end 101.

[0063] Based on the same inventive concept, a surgical system is also provided. Please refer to... Figure 9 , Figure 9 This is a schematic diagram of an embodiment of a surgical system provided in this application.

[0064] The surgical system 20 includes a guide cannula 210, a puncture needle 220, and a surgical cannula 10 as described above. The guide cannula 210 is disposed in the inner tube 120 and is fitted over the puncture needle 220.

[0065] That is, the puncture needle 220 can be placed in the guide cannula 210 and can enter the surgical position in the tissue along the axial direction of the inner tube 120, thereby realizing tissue puncture.

[0066] The puncture needle 220 has a bendable portion 221 at its end, so that the end of the puncture needle 220 can be adapted to the bending of the insertion end 101 of the surgical cannula 10.

[0067] In summary, this application provides a surgical cannula. The surgical cannula provided by this application can achieve overall bending by using ribs and flexible components in conjunction with the outer tube; in addition, the ribs and flexible components can be formed by cutting the ends of the inner tube, thereby improving the strength of the entire surgical cannula during bending.

[0068] The above embodiments are merely illustrative examples of the present invention and not all embodiments. The present invention may also be implemented in other specific ways or forms without departing from the spirit or essential characteristics of the present invention. Therefore, the described embodiments should be considered illustrative rather than limiting in any respect. The scope of the present invention should be defined by the appended claims, and any variations equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A surgical cannula for transjugular intrahepatic portosystemic shunt, characterized in that, The surgical cannula includes: The outer tube and inner tube are nested together, and the insertion end of the surgical cannula is used to insert into the tissue to form a channel for surgical instruments to enter. The outer tube at one end of the insertion end of the surgical cannula is configured to bend in a predetermined direction; The inner tube includes a connected inner tube body and an adjusting tube, wherein the adjusting tube is connected to the end of the inner tube body and is provided corresponding to the insertion end of the surgical cannula; The bending tube includes ribs and a bendable component arranged side by side. The ribs are connected to the end of the bendable component away from the inner tube body, and the end of the ribs close to the inner tube body is connected to the inner tube body. The flexible member is connected to the outer tube at one end near the inner tube body. By moving the outer tube along the axial direction of the inner tube, the rib moves relative to the flexible member, thereby causing the flexible member to bend.

2. The surgical cannula as described in claim 1, characterized in that, The flexible component includes a first connecting strip and two rows of comb teeth located on opposite sides of the first connecting strip. Each row of comb teeth includes multiple comb teeth. One end of each comb tooth is connected to the first connecting strip, and the other end is directed toward the rib.

3. The surgical cannula as described in claim 2, characterized in that, The two rows of comb teeth are symmetrically arranged with the first connecting strip as the axis of symmetry.

4. The surgical cannula as described in claim 1, characterized in that, The outer tube, located at the insertion end of the surgical cannula, includes multiple movable components, with each first side of the multiple movable components connected in sequence; each second side of the multiple movable components is configured to be movable.

5. The surgical cannula as described in claim 4, characterized in that, Each of the second sides of the plurality of movable members is configured to be movable, and the second side of each of the movable members is configured to press against the next movable member.

6. The surgical cannula as described in claim 5, characterized in that, Each of the movable parts has a protrusion and a groove on the outer wall of its second side. The protrusion and the groove are located at opposite ends of the outer wall of the second side. The protrusion is positioned toward the next movable part and is partially inserted into the groove of the next movable part. In the initial state, the protrusion of the movable member is spaced apart from the inner wall of the groove of the corresponding next movable member.

7. The surgical cannula as described in claim 6, characterized in that, Both the outer tube and the inner tube are provided with an alignment part at one end of the insertion end of the surgical cannula to achieve the installation and positioning of the outer tube and the inner tube. The ribs and the flexible components are integrally formed.

8. The surgical cannula as described in claim 1, characterized in that, The surgical cannula also includes a handle, which includes a handle base and a rotating component; On the side away from the insertion end, one of the outer tube and the inner tube is fixedly connected to the handle base, and the other of the outer tube and the inner tube is screwed to the rotating member. By rotating the rotating member, one of the outer tube and the inner tube can be driven to move axially relative to the other.

9. The surgical cannula as described in claim 8, characterized in that, The surgical cannula also includes a fixing element and a lead screw; The outer tube is connected to the fixing member, and the fixing member is embedded in the handle base; The inner tube is connected to the lead screw, and the lead screw is screwed to the rotating component.

10. A surgical system, characterized in that, The surgical system includes a guide cannula, a puncture needle, and a surgical cannula as described in any one of claims 1-9; The guide sleeve is disposed in the inner tube and is sleeved on the puncture needle.

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